Impact of a Liquid Drop Against a Flat Surface

Bechtel, Stephen E.; Bogy, David B.; Talke, Frank E.

doi:10.1147/rd.256.0963

Cited by 75 publications

(61 citation statements)

References 4 publications

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“…The time between the beginning of wet spreading and the attainment of the D f ranges from several seconds to tens of seconds. It has been also observed that the droplet shows splash when the Weber number is higher than 80 (8) . Note that the characteristics of the initial spontaneous spreading by inertia for several microseconds after impact are very different from those of the ensuing wet spreading for tens of seconds.…”

Section: Droplet Impactmentioning

confidence: 95%

“…Droplet spreading on the substrate consists of an initial spontaneous (dynamical) spreading for a short time and then a wet spreading for a longer time. Although there are many papers about droplet spreading on solid surfaces (8) - (18) , none of the papers explain the connection of the two types of spreading. We try to connect the two types of spreading in this paper.…”

Section: Droplet Impactmentioning

confidence: 99%

“…The spontaneous spreading of a liquid droplet has been investigated in various fields of engineering (8) - (14) . Fukai (9) reviewed the published numerical simulation and semi-empirical models for spontaneous spreading.…”

Section: Spontaneous Inertial Spreading Of Dropletsmentioning

confidence: 99%

See 2 more Smart Citations

Droplet Behaviors on Substrates in Thin-Film Formation Using Ink-Jet Printing

Ikegawa

Azuma

2004

JSME Int. J., Ser. B

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Physical phenomena associated with the dynamic spreading and dried shape of droplets on solid surfaces were demonstrated reviewing several models and discussed with regard to designing the most suitable thin-film formation processes using ink-jet printing. After droplets strike a substrate surface and expand for several microseconds, they spread semistatically for tens of seconds and asymptotically approach the final equilibrium shape determined by droplet volume and contact angle. The contact angle and the volume, number, and impact velocity of droplets for various ink-jet-deposition applications can be designed by using semi-empirical formulas. If the contact angle at the edge of droplet on the substrate is small, a large amount of solute might accumulate there during the drying process because the evaporation rate there is high. The evaporation rate distribution on droplet surfaces should therefore be controlled to be uniform in radial direction during drying.

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Section: Droplet Impactmentioning

confidence: 95%

Section: Droplet Impactmentioning

confidence: 99%

See 1 more Smart Citation

Droplet Behaviors on Substrates in Thin-Film Formation Using Ink-Jet Printing

Ikegawa

Azuma

2004

JSME Int. J., Ser. B

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“…Numerous analytic models have been proposed to determine the maximum spreading diameter for the moderate to high impact We and Re numbers [29][30][31][32][33]. There are however few dynamic models to compute the instantaneous droplet diameter [34][35][36]. Several of these models are presented in Table III and are compared against the experimental data of Briones et al [18], Figure 5 presents the error in predicting the maximum spreading diameter, ξ max , using these models.…”

Section: Spreading Regime In Free Fallmentioning

confidence: 99%

Simulation of the spreading of a gas-propelled micro-droplet upon impact on a dry surface using a lattice-Boltzmann approach

et al. 2017

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Spray cooling is one of the most promising methods of cooling high heat flux electronics. Depending on the type of the nozzle, spray cooling can be categorized as single phase or two phase.In the latter, which is known to be more effective, a secondary gas is used to further pressurize the liquid and form smaller droplets at higher velocities. The gas is also assumed to assist the spreading phase by imposing normal and tangential forces on the droplet free surface which adds to the complicated hydrodynamics of the droplet impact. Moreover, the order of magnitude of droplet size in spray cooling is 10 −6 m thereby introducing a low Weber and Reynolds numbers impact regime which heretofore has not been well understood. A 3D lattice Boltzmann method was implemented to simulate the impact of a single micro-droplet on a dry surface in both ambient air and under a stagnation gas flow. Two cases were closely compared and correlations were proposed for the instantaneous spreading diameter. Contrary to recent findings at higher impact We and Re, it was found that stagnation flow only significantly affects the spreading phase for Ca * ≥ 0.35 but has little influence on the receding physics.

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“…A third challenge is control of the deposition of these droplets; this involves issues of droplet flight path, impact, and substrate wetting or interaction [31][32][33][34][35]. In printing processes, either the print head or the substrate is usually moving, so the calculation of the trajectory of the droplets must take this issue into account.…”

Section: Technical Challenges Of Mjmentioning

confidence: 99%

Material Jetting

Gibson¹,

Rosen²,

Stucker³

2015

Additive Manufacturing Technologies

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Printing technology has been extensively investigated, with the majority of that investigation historically based upon applications to the two-dimensional printing industry. Recently, however, it has spread to numerous new application areas, including electronics packaging, optics, and additive manufacturing. Some of these applications, in fact, have literally taken the technology into a new dimension.

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Impact of a Liquid Drop Against a Flat Surface

Cited by 75 publications

References 4 publications

Droplet Behaviors on Substrates in Thin-Film Formation Using Ink-Jet Printing

Droplet Behaviors on Substrates in Thin-Film Formation Using Ink-Jet Printing

Simulation of the spreading of a gas-propelled micro-droplet upon impact on a dry surface using a lattice-Boltzmann approach

Material Jetting

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